Calling Methods For Java GradeBook - Calculate Highest And Lowest Grades In Array

Apr 15, 2015

In this project each individual will create a data analysis program that will at a minimum,

1) read data in from a text file,
2) sort data in some way,
3) search the data in some way,
4) perform at least three mathematical manipulations of the data,
5) display results of the data analysis in numeric/textual form, and
6) display graphs of the data. In addition,
7) your program should handle invalid input appropriately and
8) your program should use some "new" feature that you have not been taught explicitly in class.

(Note: this is to give you practice learning new material on your own - a critical skill of today's programmer.) If you do not have a specific plan in mind for your project, below is a specific project that meets all of the qualifications as long as 7) and 8) are addressed in the implementation.

Everything is done except I need to call my methods in my GradeTester.

GradeBook:

/**
*This class creates an array called scores.
*This class determines the length of the array scores and determines the last grade in the array scores.
*This class sorts the array using a bubble sort, and searches the array.
*This class calculates the mean, standard deviation, and the median of the grades in the array scores.
*Once the grades in the array is sorted, the class then calculates the highest and lowest grades in the array.
*/

public class GradeBook {
public final int MAXARRAY_SZ = 20;
double [] scores = new double [MAXARRAY_SZ];
int lastGrade = 0;
double mean = 0;

[Code] ....

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Reading Lowest / Highest / Average Grades And Reporting Them From For Loops?

May 3, 2014

import java.util.*;
import java.text.*;
public class Quiz {
public static void main(String[] args){
Scanner s= new Scanner(System.in);
int quests = 0;
String input ="";

[code]....

I'm not getting any errors anymore.

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Feb 23, 2014

I am working on an assignment but I am not getting any out put and I couldn't fix it?The class HighLow below asks for three integers and prints the highest and lowest of them on screen. Your task is to write the missing methods high and low, which receives the integers user inputs as parameters and return the highest and lowest integers respectively.

import java.util.Scanner;
public class HighLow {
public static void main(String[] args) {
int number1, number 2, number 3, high, low;
Scanner reader = new Scanner(System.in);

[code]......

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Printing Highest And Lowest Of Three Numbers Using Java

Feb 23, 2014

The class HighLow below asks for three integers and prints the highest and lowest of them on screen. Your task is to write the missing methods high and low, which receives the integers user inputs as parameters and return the highest and lowest integers respectively.

import java.util.Scanner;
public class HighLow {
public static void main(String[] args) {
int number1, number 2, number 3, high, low;
Scanner reader = new Scanner(System.in);

[code]....

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Java program takes positive int from user and determine if prime. Next the program finds next highest or next lowest prime number.

import java.io.*;
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public class pa2take2 {
public static void main (String[]args){
int menus; //menu selection

[Code] ......

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Write A JAVA Program That Will Input 10 Scores And Output Highest And Lowest Score

Jan 9, 2015

1.Write a JAVA program that will input 10 scores and output the Highest and Lowest score.

2.Write a JAVA program that will input the base and power and display the result: Example: Base is 4 Power is 2 the answer is 16 (Note: Math.pow( ) method is not allowed)

3.Write a JAVA program that will input an integer number, and then will output the sum of all inputted numbers. The program will stop in accepting inputs if the user entered 0.

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Feb 13, 2015

So I have this code to calculate the lowest value of an array:

public class Exercise1 {
public static void main(String[] args) {
int[] theArray = {1/*/,2,3,4,5,6,7,8,9,10/*/};
int result = Exercise1.min(theArray);
System.out.println("The minimum value is: " +result);

[code].....

and I need to write an exception class that should be thrown if the array does not hold any elements.

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Simple GradeBook - Switch Statement To Count A B C D And F Grades

Nov 4, 2014

// GradeBook class uses switch statement to count A, B, C, D and F grades.

import java.util.Scanner;
public class GradeBook
{
private String courseName;
private int total;
private int gradeCounter;
private int aCount;

[Code] .....

Then eclipse told me that:

"Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at chapter5_control_statements_II.GradeBook.inputGrades(GradeBook.java:52)
at chapter5_control_statements_II.GradeBookTest.main(GradeBookTest.java:11)"

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Sorting From Lowest To Highest

Feb 23, 2014

I'm very new to Java and ran into a problem. My results are not in order and I'm not sure what I'm doing wrong.

My results come out like this instead of being in order from lowest to highest: "77 99 44 55 22 88 11 0 66 33"

Here's what I have:

class ArrayIns {
private long[] a; // ref to array a
private int nElems; // number of data items
//--------------------------------------------------------------
public ArrayIns(int max) // constructor
{
a = new long[max]; // create the array
nElems = 0; // no items yet

[Code] .....

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Sep 14, 2014

So I have created this program but I am having a couple of small problems with it. The first problem is that the user inputted numbers should all be on the same line. I have spent hours trying to figure this out and I have looked online but I've had no luck. The second problem is that the "lowest score" should be 42 and not 42.0. I don't understand how to make it so the number is an integer. I have posted the output that i'm getting and the way the output should look like at the bottom.

import java.util.Scanner;
public class Random
{
public static void main(String [ ] args) {
Scanner input = new Scanner(System.in);
double a, b, c;

[Code] .....

This is the output that i'm getting.

Enter three scores: 87
42
94

The average is: 74.33333333333333
The lowest score was: 42.0
The average without the lowest score is: 90.5
The grade is: A

This is the way the output should look like.

Enter three scores: 87 42 94

The average is: 74.33333333333333
The lowest score was: 42
The average without the lowest score is: 90.5
The grade is: A

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Oct 22, 2014

Write a program that promts a professor to input grades for five different courses for 10 students. Prompt the professor to enter only A,B,C,D, or F for grades(A is the highest grade, F fail). use variables for student number(1 through 10) and grade numbers(1 through 5). create a menu for Search. if the user select search it will prompt a letter correspond to grade. display all student with selected grade. if the user just enter nothing, display all student with their grade sorted from highest to lowest.

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Apr 16, 2014

I am making a gradebook program that calculates the averages of 25 students using 2D arrays in which the students have four test grades. I have figured out how to display the averages of each student in one column but I cant seem to figure out how to display the letter grade of the average into another column.

Right now my program reads from a .txt doc

Heres what I've got.

TestGradeBook.java

import java.util.*;
import java.io.*;
public class TestGradeBook {
public static void main (String [] args ) throws IOException{
//Declarations
final int ROWS = 100;
final int TESTS = 4;

[Code] .....

GradeBook_Data.txt
Name100100100100
// basic name and grades

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Jan 5, 2015

I am not getting the result I am looking for, but I'm sure I'm on the right track. I have an array, names + times of marathon runners, and should end up with a program that displays the slowest runner, and the next-slowest runner.

Currently, I get this:
The lowest time is 273.
The lowest time is 243.

Changing names.length to times.length changes nothing.
for (i = 1;... ) changes nothing.

The displayed number should currently only be 243. Why is it displaying 273 first, and at all?

The code:

class Marathon {
public static void main (String[] arguments) {
String[] names = {"Elena", "Thomas", "Hamilton", "Suzie", "Phil", "Matt", "Alex", "Emma", "John", "James", "Jane", "Emily", "Daniel", "Neda", "Aaron", "Kate"};
  int[] times = {341, 273, 278, 329, 445, 402, 388, 275, 243, 334, 412, 393, 299, 343, 317, 265};
  int min = times [0];
  for (int i = 0; i < times.length; i++) {
if (times[i] < min){
min = times[i];
System.out.println("The lowest time is " + min +".");
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public static void main(String[] args) {
printTitle();
enterMark();
gradeCalculator(mark);
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[Code] .....

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Java Code:

public interface Controller {
public void show ();
}
public class MainActivity extends AndroidApplication implements Controller {
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Write a program that prompts the user to input cash amounts and use a method to calculate the average amount for a week given 7 inputs of daily cash intake amounts for a cash register. Use an array to store the values. Recall that average is the sum of the values divided by the number of values. The method should take argument(s) of type double and return average weekly cash amount as a double.

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I've been asked to write a program that uses an array of grades, and to tally how many A's, B's etc ... The tallies are coming up incorrectly ... I'm putting the instructions at the end of this post to show what I should be getting.

import javax.swing.JOptionPane;

public class GradeCalculation {
public static void main(String[] args) {
//define array, grade values, and tally the amount of each grade
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[Code] ....

The assignment: Add logic inside the for loop to test if the number is between 90 and 100. If it is in this range, then add 1 to the tally of a gradeA. You should have another test to see if the number is between 80 and 89 and if it is it should add 1 to the tally of gradeB. You should continue to have tests for 70 to79 being gradeC; 60-69 being graded; and below 60 as being gradeF. After the for loop is done, you should display a list of how many students had A's, B's, etc. in the output message box.

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The number of students with scores of 70-79 (C ) is 1
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